Valve mechanism



Aug. 20, 1935.

C. E. HATCHER ET AL VALVE MECHANISM Filed June 10, 1933 4 l I ,q I4 II 28 2 I q l I I Z 2 12 7 ,2 2 24 26 26 Patented Aug. 20, 1935 PATENT F FICE VALVE MECHANISM Craig E. Hatcher, Marinus Christensen, and

Charles M. Hatcher, Victoria, Tex;

said

Christensen and said Craig E. Hateher assignors to said Charles M. Hatchet Application June 10, 1933, Serial No. 675,252

4 Claims. (01. 251-144) This invention relates to valve mechanism.

An object of the invention is to provide a valve mechanism of the character described specially designed for use in slush pumps and for other similar purposes particularly where gritty fluid is to be pumped or handled.

Another object of the invention is to provide a valve mechanism having a novel type of valve seat.

A further object is to provide in valve mma nism a novel valve assembly designed to to m a close fitting joint with the seat to prevent leakage.

A still further object is to' provide in valve mechanism a noveltype of seat assembly including a removable we'ar ring and a removable guide retained in place by said ring.

With the above andother objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts an example of which is given in .v this specif cation and illustrated in the accompanying drawing, wherein:

Figure 1 shows a vertical sectional view of the valve mechanism as installed in a pump, and

Figure 2 shows a cross sectional view taken on the line 2-2 of Figure 1. U

Referring now more particularly to the drawing, wherein like numerals of reference designate similar parts, in'each of the figures, the numeral i designates, generally, a pump having a partie tion 2 separating the. inlet or suctionchamber from the discharge chamber 3. The partition 2 t has a tapering opening 4 therethrough and driven or otherwise secured in said opening there is the ring 5 whose upper end is flared forming a seat 6. Beneath this seat the ring 5 is contracted in wardlyforming an annular shoulder on which is located a removable wear ring 8 whose upper surtilagce is upwardly tapered forming a lower sea There is a valve assemblycomprising the disc It and the upper and lower clamp plates ll, l2 between which said disc is clamped. This disc I!) is preferably formed of rubber or other-yieldable material and its lower side is formed with a flat face which rests on the plate l2 and the central portion of whose .upper side is formed with a flat face on which the plate ll rests. The valve assembly is mounted on a valve stem l3. Above the plate II this sternhas an enlarged annular rib i4 thereon and beneath said rib is tapered downwardly. The clamp plates I I,- I2 are formed with the depending hubs l5, it, which have tapering bearings therethrough to receive the tapered '21, so as to reduce the friction surface between lower end of the stem I3. When the parts of the valve assembly are assembled said assembly may be driven onto the tapered portion of the stem l3 and pinned thereon by the cross pin i'! which is driven through aligned bearings in the hub i6 5 and the stem l3 whereby the resilient disc I0 is securely clamped between the upper and lower plates l I, I2. The plate [2 is of a diameter to fit closely within the ring 5 and at the underside of its outer margin is beveled to form the, annular face l8 which conforms to the taper of the seat 9 with which it coacts. The outer margin of the disc I 0 is thickened upwardly so that said disc is of a shallow cup-shaped form and said outer margin is upwardly flared or beveled forming the annular face I9 which conforms to the shape of and coacts with the seat 6.

On the pump i is a cap having the guide 2i to receive the upper end of the stem l3 and surrounding said stem and interposed between the cap 20 and the clamp plate I! is a coil spring 22 which normally maintains the valve closed.

The inside of the ring 5 has the vertical grooves 23, 23, extending from the shoulder 8 downwardly but whose lower ends terminate above the lower side of. said ring 5 forming the abutments or shoulders 24, 24. There is a spider comprising the central guide 25 and the oppositely extending arms 26, 26, the free ends of said arms projecting into grooves 23, and resting on the shoulders 24, said arms being retained in place by the ring 8. v

The lower end of the,ste1n it works through said guide 25 and is formed with flat faces as the stem and the guide 2.5 and so as to'provide clearance between said faces and the guide bearing to permit the sand and other gritty substances to readily pass out from between the stem and guide bearing.

'Special attention/is called to the shape of the valve disc 10, whose outer margin terminates in the annular lip 28. The pressure of the fluid in the chamber& acting against said valve disc will tend to spread said disc and cause it to conform to the shape of and to fit closely against the seat 6, notwithstanding any irregularities that may existin' said seat to the end that a tight joint between the disc and seat will be maintained when the valve is closed. r

The wear between contacting metal parts of the valve and seat will be in a large'measure sustained by the ring 8 and when this ring 8 is worn until it no longer performs its proper function, a new ring may be substituted for it so that the ring '5 need not be replaced but may be used for an indefinite length of time.

The drawing and description disclose what is now considered to be a preferred form of the invention by way of illustration only, while the broad principle of the invention will be defined by the appended claims. a

What we claim is: J

1. In a valve mechanism a ring having a flared seat and an inside annular shoulder spaced beneath said seat, said ring having inside vertical grooves beneath said shoulder whose lower ends terminate above the lower face of said ring, a spider having a central guide and arms whose outer ends rest in said grooves, a wear ring on said shoulder efiective to retain said arms in place.

2. In a valve mechanism a ring having a flared seat and an inside annular shoulder spaced beneath said seat, said ring having inside vertical grooves beneath said shoulder whose lower ends terminate above the lower face of said ring, a spider having a. central guide and arms whose outer ends rest in said grooves, a wear ring on said shoulder effective to retain .said arms in place, and a valve arranged to cooperate with said seat and having a stem which works through the guide of said spider.

3. In a valve mechanism, a ring havingv a valve and an inside annular shoulder spaced beneath the seat, said ring having inside vertical grooves beneath the shoulder whose lower ends tenninate above the lower face of the ring, a. spider having a central guide and arms whose outer ends rest in said grooves, a wear ring on the shoulder eilective to retain said arms in place and a valve arranged -to cooperate with said seat and having a stem which works through the guide of said spider.

CRAIG E. HATCHER.

MARINUS CHRISTENSEN.

CHARLES M. HATCHEB. 

